chore(BRE2-1009): cleanup for ARM support

[patelspratik]

• remove some deprecated code
• download cloudflare for linux arm64

[codecov]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 24.67%. Comparing base (83ace83) to head (afe161e).
⚠️ Report is 30 commits behind head on main.

Files with missing lines	Patch %	Lines
pkg/cmd/start/start.go	0.00%	6 Missing ⚠️
pkg/store/cloudflared.go	0.00%	2 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #438      +/-   ##
==========================================
+ Coverage   20.09%   24.67%   +4.58%     
==========================================
  Files         140      134       -6     
  Lines       18451    18337     -114     
==========================================
+ Hits         3707     4525     +818     
+ Misses      14328    13335     -993     
- Partials      416      477      +61     

Flag	Coverage Δ
Linux	24.67% <0.00%> (+4.58%)	⬆️

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